Probably won't be any. It's been quite a few years since they have had E Ride Nights in September.
But, they should have the Spectromagic parade once or twice during your stay. Those nights, the park will be open until well after dark.
They also have the Wishes fireworks nightly. The show doesn't begin until it's dark out. Remember, it does get darker a lot earlier during the Fall / Winder months.